MAX8814 MAXIM [Maxim Integrated Products], MAX8814 Datasheet - Page 5

• Manufacturer Part Number: MAX8814
• Description: 28V Linear Li+ Battery Charger with Smart Autoboot Assistant
• Manufacturer: MAXIM [Maxim Integrated Products]

PIN
—
1
2
3
4
5
6
7
8
NAME
BATT
GND
ISET
ABO
POK
ABI
EN
_______________________________________________________________________________________
EP
IN
Input Supply Voltage. Bypass IN to GND with a 1µF or larger ceramic capacitor to minimize line noise
and maximize input transient rejection.
Ground. Connect GND and the exposed paddle to a large copper ground plane for maximum power
dissipation. Connect GND to the exposed paddle directly under the IC.
Charge-Current Program and Fast-Charge Current Monitor. Output current from ISET is 877.2µA per
ampere of battery charging current. Set the charging current by connecting a resistor (R2 in Figure 3)
from ISET to GND. I
Figure 4.
Autobooting External Input. See the Autobooting Assistant section and Table 1 for autobooting
conditions. ABI is pulled to GND through an internal 200kΩ resistor.
Autobooting Logic Output. See the Autobooting Assistant section and Table 1 for autobooting
conditions.
Logic-Level Enable Input. Drive EN high to disable charger. Drive EN low or leave unconnected for
normal operation. EN has an internal 200kΩ pulldown resistor.
Input-Voltage Status Indicator. Connect a 1MΩ pullup resistor from POK to an external system supply.
POK is an open-drain output that asserts low when V
(V
Battery Connection. Bypass BATT to GND with a minimum of 2.2µF of capacitor.
Exposed Paddle. Connect the exposed paddle to a large ground plane for maximum power
dissipation. Connect GND to the exposed paddle directly under the IC.
28V Linear Li+ Battery Charger with
IN
- 40mV), the IC is shut down and POK becomes high impedance.
FAST-CHARGE
Smart Autoboot Assistant
= 1596V / R
FUNCTION
ISET
. To configure the MAX8814 as a USB charger, see
IN
> 4.25V and (V
IN
- V
Pin Description
BATT
) ≥ 40mV. If V
BATT
≥
5